Emergency back-up underwater breathing apparatus



FIG. 1 is a front perspective view of an underwater breathing apparatus showing our new design;

FIG. 2 is an enlarged bottom plan view thereof;

FIG. 3 is an enlarged top plan view thereof;

FIG. 4 is a front view of the device; and

FIG. 5 is a side view of the device. 

The decorative design of an emergency back-up underwater breathing apparatus, as shown and described. 